Evaluation of Random Urine Sample Protein-Cretinine Ratio as an Index of Quantitative Proteinuria

ABSTRACT

The present study was conducted to find out a correlation between protein to creatinine (PC) ratio in random sample and 24 hr. urinary protein (UP) in patients with proteinuria with normal renal functions (serum cretinine<1.5 mg %) -group-I, with impaired renal functions, mild to moderate (s.cretinine 1.5-4.0mg%) group-II and advance renal failure (s.cretinine >4.0mg%) -group-III. 24 hr. and a random urine sample was taken for each patient and was tested for protein and creatinine. PC ratio was found in each random sample. The mean 24 hr.UP (g/24 hr.) estimated by 24 hr. urine collection was 1.15± 0.97, 3.26 ±1.34 and 7.39±2.19 in group I, II and III respectively. However, the mean UP estimated by random sample was 1.35±1.09, 3.94±1.93 and 10.38±3.70 in group-1, group-II and group-III respectively. P value was statistically insignificant in group 1 & II. However, there was significant difference in values in group-III (P=0.012). Coefficient of correlation on univariate analysis was r=0.889 in group-I, 0.788 in group-II and 0.375 in group-III indicating a significant correlation in results in groupI and II and not in group-III. The results in the study have shown that single voided urine method of estimating quantitative proteinuria holds its value in patients with normal, as well as in mild to moderately impaired renal functions. However, this method does not hold good for patients with severely impaired renal functions.